99 WJ swap from 247 trasfer case to a 242
I have a 99 Grand Cherokee with a 247 quada drive transfer case that needs replaced. I'm having problems finding one. I have found a bunch of the 242 transfer cases. I was wondering how hard it is to swap them and what all parts need changed. Any info would be appreciated. This is the first Jeep Ive owned so not to familiar with them.